1.2 Special x86 Notes

Be aware of some important issues when compiling for x86 Oracle Solaris platforms.

Programs compiled with -xarch set to sse, sse2, sse2a, sse3, or beyond must be run only on platforms that provide these extensions and features.

Numerical results on x86 might differ from results on SPARC due to the x86 80-bit floating-point registers. To minimize these differences, use the -fstore option or compile with -xarch=sse2 if the hardware supports SSE2.

Numerical results can also differ between Oracle Solaris and Linux because the intrinsic math libraries (for example, sin(x)) are not the same.